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CN1370341A - Portable radio unit - Google Patents

Portable radio unit Download PDF

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Publication number
CN1370341A
CN1370341A CN00811709A CN00811709A CN1370341A CN 1370341 A CN1370341 A CN 1370341A CN 00811709 A CN00811709 A CN 00811709A CN 00811709 A CN00811709 A CN 00811709A CN 1370341 A CN1370341 A CN 1370341A
Authority
CN
China
Prior art keywords
mentioned
dipole antenna
radio unit
portable radio
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN00811709A
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Chinese (zh)
Inventor
东海林英明
今西康人
深泽彻
大岭裕幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
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Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CN1370341A publication Critical patent/CN1370341A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/30Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/08Means for collapsing antennas or parts thereof
    • H01Q1/084Pivotable antennas
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00Antenna arrays or systems
    • H01Q21/28Combinations of substantially independent non-interacting antenna units or systems
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/16Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285Planar dipole
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827Portable transceivers
    • H04B1/3833Hand-held transceivers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

One aspect of a portable radio unit (1) of the present invention has a case (2), a cover (3) openably and closably mounted on the case (2), an opening/closing detection device (7) that detects opening/closing of the cover (3), a dipole antenna (5) provided on the cover (3), a power feeding device (4a,4b,6a,6b) for feeding the dipole antenna (5), and a power feeding control device (8) for controlling the power feeding device (4a,4b,6a,6b) in accordance with opening/closing of the cover (3). On the other hand, the portable radio unit (1) has a resonator (9) provided on the housing (2), and the resonator (9) is disposed at a position close to the dipole antenna (5) when the cover (3) is closed. On the other hand, the 1 st and 2 nd matching circuits (12,13) are switched and connected to the feeding device (6) and the dipole antenna (5) in accordance with the opening and closing of the cover (3).

Description

Portable radio unit
Invention field
The present invention relates to portable radio unit, relate in particular to portable radio unit with the antenna in cover (housing) portion freely of opening and closing that is arranged on (hereinafter referred to as lid (cover)).
Background technology
Disclose one on the Te Kaiping 8-186518 communique and opened and closed the example that covers radio communication device freely with antenna.
Above-mentioned lid antenna has the 1st and the 2nd assembly, when lid is opened the 1st assembly is tuned as the operating frequency that receives transtation mission circuit, when lid is closed the 2nd assembly is tuned as the operating frequency of reception transtation mission circuit.Therefore, no matter cover when opening or closing, the lid antenna can both be tuned as the operating frequency that receives transtation mission circuit.
But, in the above-mentioned document in the disclosed radio communication device, cover and have 2 antennas in fact, because the combination of these antenna may reduce antenna efficiency.And, in the above-mentioned lid antenna, 2 feed lines must be arranged, so mechanism is complicated, be not easy to the setting of feed line.
Summary of the invention
The present invention makes in order to address the above problem.The objective of the invention is, cover freely in the portable radio unit that antenna is set, when suppressing antenna efficient reduces, make being provided with of feed line simple in switching.
An aspect according to portable radio unit of the present invention has: casing, lid, dipole antenna, feeder equipment, open-close detection apparatus and feed control device.Lid opens and closes and is mounted freely on the casing.Dipole antenna is arranged on and covers.Feeder equipment is given the dipole antenna feed.Open-close detection apparatus detects the switching of lid.The feed control device is according to the testing result control feeder equipment of open-close detection apparatus.
Antenna is arranged on when covering, and is opening under the state of lid, because as general dipole antenna work, the frequency band of the reflection loss amount of pact-6dB can obtain about 20%.But, under the lid closing state, because antenna exists its frequency band to reduce to the problem of about 2% (Fig. 2 A) near the earthed conductor of the substrate of casing inside.Therefore, the present inventor through attentively research repeatedly, learns covering under the situation that a dipole antenna only is set, and by suitably controlling feeder equipment according to the switching of lid, also can guarantee to compare broad less than the frequency band of the reflection loss amount of setting.Particularly, as hereinafter described, for example adopt parallel 2 line formula feed lines as feeder equipment, work hard by the excitation orientation at this feed line, shown in Fig. 2 B, lid is when closing, also can guarantee pact-6dB the reflection loss amount frequency band about 15%.Thus, no matter cover when opening or closing and to come correspondence with an antenna, 2 antennas needn't be set as conventional example.Its result, reduction that can suppressing antenna efficient.And because 2 antennas needn't be set, it is easy that the setting of feed line also becomes.
Above-mentioned feeder equipment comprises parallel 2 line formula feed lines.In the case, under the state that lid is opened,, covering under the closing state with the parallel 2 line formula feed lines of cophase detector with the parallel 2 line formula feed lines of anti-phase excitation.Thus, no matter cover as mentioned above when opening or closing, can both guarantee the frequency band of the reflection loss amount of pact-6dB.
In addition, above-mentioned feeder equipment also can comprise coaxial line.Coaxial line has external conductor and inner conductor, and external conductor and casing short circuit encourage inner conductor under the state that lid is opened, and encourages external conductor under the lid closing state.
Like this by under the state of opening at lid, encouraging external conductor, obtain with the identical effect of the above-mentioned parallel 2 line formula feed lines of cophase detector.And, by encouraging inner conductor under the closing state at lid, obtain with the identical effect of the above-mentioned parallel 2 line formula feed lines of anti-phase excitation.Therefore, can infer no matter cover when opening or closing, can both guarantee the frequency band of the reflection loss amount of pact-6dB.
Interval between the short dot on the distributing point of external conductor and the external conductor and casing is preferably quarter-wave.
Thus, because the estimation impedance from the power supply to the short dot is infinitely great, so it is less to the influence of the impedance of distributing point to suppress short dot.
Have casing, lid, dipole antenna, feeder equipment, resonator on the other hand according to portable radio unit of the present invention.Lid opens and closes and is mounted freely on the casing.Dipole antenna is arranged on and covers.Feeder equipment is given the dipole antenna feed.Resonator is arranged on the casing, is configured in the position of covering close dipole antenna when closing.
When lid was closed, frequency band narrowed down usually.But,, can disperse the low frequency of reflection loss quantitative change by resonator being arranged on the above-mentioned position.Thus, for example, obtain the frequency characteristic shown in Fig. 7 B, its result can guarantee also that when lid is closed the frequency band of the reflection loss amount of pact-6dB compares broad.On the other hand, when lid is opened, shown in Fig. 7 A, also can guarantee the frequency band broad of the reflection loss amount of pact-6dB.No matter its result is covered when opening or closing, and can both guarantee the frequency band of the reflection loss amount of pact-6dB.
In addition, resonator can use a terminal shortcircuit, quarter-wave resonator that the other end is open or 1/2nd wave resonator of both ends open.
One side again according to portable radio unit of the present invention has: casing, lid, dipole antenna, feeder equipment, open-close detection apparatus, the 1st and the 2nd match circuit and the 1st and the 2nd diverter switch.Lid opens and closes and is mounted freely on the casing.Dipole antenna is arranged on and covers.Feeder equipment is given the dipole antenna feed.Open-close detection apparatus detects the switching of lid.The 1st diverter switch according to the testing result of open-close detection apparatus, is switched connection the 1st and the 2nd match circuit and feeder equipment.The 2nd diverter switch according to the testing result of open-close detection apparatus, is switched connection the 1st and the 2nd match circuit and dipole antenna.
Switch under the situation of match circuit according to the switching of lid as mentioned above,, can disperse the low frequency of reflection loss quantitative change with same under the situation that resonator is set.Thus, no matter cover when opening or closing, can both guarantee the frequency band of the reflection loss amount of pact-6dB.
In any one above-mentioned aspect, preferably dipole antenna extends along the direction vertical with the length direction of casing.
Thus, when the inclination casing was conversed, it is many that polarized wave composition perpendicular to the ground becomes, and improves with the consistency of the base station of vertically polarized wave.This also can strengthen the effect that suppressing antenna efficient reduces.
In addition, in every respect in, also the top of crooked dipole antenna simply also can bend to the top of dipole antenna snakelike.Thus, can shorten the physical length of antenna.
Description of drawings
Figure 1A is the summary construction diagram of the portable radio unit in the embodiments of the present invention 1.
Figure 1B is the block diagram that is used to illustrate feed method of the present invention.
Fig. 2 A represents in the portable radio unit shown in Figure 1A, antenna do not taked the reflection loss amount under the situation of any countermeasure and the relation of frequency during anti-phase excitation when lid is closed.
Fig. 2 B represents in the portable radio unit shown in Figure 1A, the reflection loss amount of the antenna when lid is closed during cophase detector and the relation of frequency.
Fig. 3 A is the summary construction diagram of the portable radio unit in the embodiments of the present invention 2.
Fig. 3 B be shown in Fig. 3 A the improved summary construction diagram of portable radio unit.
Fig. 4 A is the summary construction diagram of the portable radio unit in the embodiments of the present invention 3.
Fig. 4 B be shown in Fig. 4 A the part of portable radio unit enlarge side view.
Fig. 5 A is the summary construction diagram of the portable radio unit in the embodiments of the present invention 4.
Shown in Fig. 5 B presentation graphs 5A the lid of the portable radio unit state when closing.
Fig. 6 A is the summary construction diagram of the portable radio unit in the embodiments of the present invention 5.
Fig. 6 B is the circuit diagram of an example of the 1st match circuit among the presentation graphs 6A.
Fig. 6 C is the circuit diagram of an example of the 2nd match circuit among the presentation graphs 6A.
The reflection loss amount of the antenna when lid is opened of the portable radio unit of type shown in Fig. 7 A presentation graphs 5A and Fig. 6 A and the relation of frequency.
The reflection loss amount of the antenna when lid is closed of the portable radio unit of type shown in Fig. 7 B presentation graphs 5A and Fig. 6 A and the relation of frequency.
Embodiment
Use Figure 1A to Fig. 7 B that embodiments of the present invention are described below.
(execution mode 1)
Shown in Figure 1A, portable radio unit 1 has casing 2 (earthed conductor), opens and closes lid (renovating) 3, dipole antenna the 5, the 1st and the 2nd feed line 4a freely, 4b, RF (radio frequency Radio Frequency) power supply the 1st and the 2nd power supply 6a, 6b and cover open/close checking apparatus 7.
Lid 3 opens and closes and is mounted freely on the casing 2, is for example formed by dielectric materials such as organic polymers, and inside has dipole antenna 5.The length L 1 of dipole antenna 5 is 1/2nd wavelength (λ/2), and extends along the direction vertical with the length direction of casing 2.Thus, when inclination casing 2 was conversed, it is many that polarized wave composition perpendicular to the ground becomes, and improves with the consistency of the base station of vertically polarized wave.
The the 1st and the 2nd feed line 4a, 4b, the 1st and the 2nd power supply 6a, 6b is as the feeder equipment work of dipole antenna 5.The the 1st and the 2nd feed line 4a, 4b are illustrated in figure 1 as parallel 2 line formula feed lines, and by power supply 6a, 6b is connected with casing 2 respectively for the 1st and the 2nd feed line 4a, 4b.The the 1st or the 2nd feed line 4a, the long L2 of electricity that half addition of 4b and dipole antenna 5 obtains are λ/4+N * λ/2 (N is the integer greater than 1).
3 switching is covered in cover open/close checking apparatus 7 detections, and cover open/close checking apparatus for example can use the spy to open disclosed checkout gear in the flat 6-291820 communique.According to the testing result of cover open/close checking apparatus 7, the 1st and the 2nd feed line 4a, the feed of 4b are given in control.
Particularly, cover 3 when opening being detected by cover open/close checking apparatus 7, with anti-phase excitation the 1st and the 2nd feed line 4a, 4b covers 3 when closing being detected by cover open/close checking apparatus 7, with cophase detector the 1st and the 2nd feed line 4a, 4b.
Under the situation shown in Figure 1A, by control the 1st and the 2nd power supply 6a with not shown control device, the action of 6b (feeder equipment) is controlled the 1st and the 2nd feed line 4a, the energized condition of 4b as mentioned above according to the switching of covering 3 according to lid 3 switching.
Under the state that lid is opened, because as general dipole antenna work, the reflection loss amount can obtain about 20% less than the frequency band of-6dB.Fig. 2 B represents to cover 3 frequency characteristics when closing.Can confirm that by Fig. 2 B the reflection loss amount can obtain about 15% less than the frequency band of-6dB.Therefore,, no matter cover when opening or closing, can both guarantee the frequency band of the reflection loss amount of pact-6dB by carrying out aforesaid feed control.
That is to say, on lid 3, be provided with under the situation of a dipole antenna 5, also can guarantee frequency band by suitably controlling feeder equipment according to the switching of lid 3 less than the reflection loss amount of setting.
Thus, no matter when lid 3 is opened or is closed, can both be with an antenna correspondence, needn't be as conventional example two antennas be set covering.Its result, reduction that can suppressing antenna efficient.And because two antennas needn't be set, it is easy that the setting of feed line also becomes.
In addition, also can shown in Figure 1B, a power supply 6 be set,, feed control device 8 be set between the 4b, feed control device 8 is connected with cover open/close checking apparatus 7 at power supply 6 and the 1st and the 2nd feed line 4a.In the case, also can encourage the 1st and the 2nd feed line 4a, 4b as mentioned above respectively according to the switching of lid 3.By the way, an example as feed control device 8 can list distributor etc.
(execution mode 2)
Next, use Fig. 3 A and 3B explanation embodiments of the present invention 2 and improvement thereof.
As shown in Figure 3A, in the embodiments of the present invention 2, the top of dipole antenna 5 is bent.Thus, the physics that can shorten dipole antenna 5 is long, makes dipole antenna 5 compacter.Other structure is identical with the situation of the execution mode 1 shown in Figure 1A.
In addition, as shown in Figure 3, the top of dipole antenna 5 also can be bent into snakelike.Also can obtain same effect in the case.
(execution mode 3)
Below, use Fig. 4 A and Fig. 4 B explanation embodiments of the present invention 3.Shown in Fig. 4 A, use coaxial line 9 in the present embodiment 3 as feed line.Coaxial line 9 has external conductor 9a and inner conductor 9b, external conductor 9a and casing short circuit.That is external conductor 9a ground connection.
Coaxial line 9, shown in Fig. 4 B, being set to has at interval with casing, and the end of external conductor 9a is in short dot 11 and casing 2 short circuits.In addition, shown in Fig. 4 A and Fig. 4 B, the distributing point 10 of external conductor 9a and the interval L3 between the above-mentioned short dot 11 are approximately λ/4.Thus, because 11 estimation impedance becomes infinity from power supply 6a to short dot, the influence of impedance that can suppress 11 pairs of distributing points 10 of short dot is less.
In present embodiment 3, excitation inner conductor 9b under lid 3 states of opening, excitation external conductor 9a under lid 3 closing state.
Like this by excitation external conductor 9a under lid 3 closing state, obtain with the identical effect of the above-mentioned parallel 2 line formula feed lines of cophase detector.By excitation inner conductor 9b under lid 3 states of opening, obtain with the identical effect of the above-mentioned parallel 2 line formula feed lines of anti-phase excitation.
Therefore, can infer under the situation of embodiments of the present invention 3, no matter cover when opening or closing, with the frequency band that can guarantee the reflection loss amount of pact-6dB under the situation of execution mode 1 equally.
(execution mode 4)
Below, use Fig. 5 A and Fig. 5 B, embodiments of the present invention 4 are described.
Present embodiment 4 and the execution mode 5 described inventions of narrating later are used to the frequency band that uses two to separate.
Under lid 3 states of opening, owing to can make radioactive department leave human body, so have the advantage that the efficient that can suppress to be caused by human body reduces.But on the other hand, under lid 3 closing state, frequency band narrows down usually, and existence can not cover the shortcoming of the frequency band of two separation. therefore, use resonant circuit, disperse the low frequency of reflection loss quantitative change.
As a kind of method for this purpose, in the execution mode 4 shown in Fig. 5 A, resonator 9 is arranged on resonator 9 on the casing 2, shown in Fig. 5 B, be configured in cover 3 when closing near the position of dipole antenna 5, encourage in the noncontact mode by dipole antenna 5.In addition, can use same dipole antenna 5 and feeder equipment thereof under the situation with each above-mentioned execution mode.
By resonator 9 is arranged on above-mentioned position, can disperse the low frequency of reflection loss quantitative change.For example can obtain the frequency characteristic shown in Fig. 7 B.That is, when lid 3 is closed, can guarantee the frequency band of the reflection loss amount of the 2 pact-6dB of place.
On the other hand, when lid 3 is opened, owing to, shown in Fig. 7 A, can guarantee the frequency band broad of the reflection loss amount of pact-6dB as general dipole antenna work.No matter its result is covered when opening or closing, and can both guarantee the frequency band of the reflection loss amount of pact-6dB.
In addition, resonator 9 can use a terminal shortcircuit, λ/4 resonators (length L 4 is the resonator of λ/4+N * λ/2 (N is the integer greater than 1)) that the other end is open or λ/2 resonators (length is the resonator of N * λ/2 (N is the integer greater than 1)) of both ends open.Also can adopt for example tabular, wire, snakelike, spiral resonator as resonator 9 in addition.
(execution mode 5)
Below, use Fig. 6 A to Fig. 6 B explanation embodiments of the present invention 5.In the present embodiment 5,, make the frequency of closing time-division scattered reflection attenuation step-down at lid 3 by switching match circuit with switch.
As shown in Figure 6A, the portable radio unit 1 in the present embodiment 5 has: the 1st and the 2nd match circuit the 12,13, the 1st and the 2nd diverter switch 14,15 and power supply 6.
The 1st match circuit 12 is connected with dipole antenna 5 when lid 3 is opened.The 2nd match circuit 13 is connected with dipole antenna 5 when lid 3 is closed.
Fig. 6 B and Fig. 6 C represent the structure example of the 1st and the 2nd match circuit 12,13.Shown in Fig. 6 B and Fig. 6 C, the 1st and the 2nd match circuit 12,13 has electric capacity 16 and coil 17 respectively.
The 1st diverter switch 14 according to the testing result of open-close detection apparatus 7, is switched connection the 1st and the 2nd match circuit 12,13 and power supply 6 as mentioned above.The 2nd diverter switch 15 is switched connection the 1st and the 2nd match circuit 12,13 and dipole antenna 5 according to the testing result of open-close detection apparatus 14.That is, when lid 3 is opened, the 1st match circuit 12 is connected with dipole antenna 5 with power supply 6, when lid 3 is closed, the 2nd match circuit 13 is connected with dipole antenna 5 with power supply 6.In addition, also can use coaxial line 9 feed line in addition.
Can think under the situation of present embodiment,, can obtain the characteristic shown in Fig. 7 A and Fig. 7 B with identical under the situation of execution mode 4.Therefore, no matter when lid 3 is opened or closed, can both guarantee the frequency band of the reflection loss amount of pact-6dB.
As above embodiments of the present invention are illustrated, but also can carry out appropriate combination the feature of each execution mode.And, will be understood that this disclosed execution mode to have a few all be example, be not to be used for restriction.Scope of the present invention comprises the scope of claim and all changes in the equal meaning and the scope by the scope indication of claim.
Industrial applicability
The present invention effectively is applicable to opening and closing the lid (renovating) freely be arranged on the casing and establishes Put the portable radio unit of antenna.

Claims (17)

1.一种便携式无线电单元,具有:1. A portable radio unit having: 机壳(2);Chassis (2); 开闭自由地安装在上述机壳(2)上的盖(3);Open and close the cover (3) freely installed on the casing (2); 设置在上述盖(3)上的双极天线(5);a dipole antenna (5) arranged on the above-mentioned cover (3); 用于给上述双极天线5馈电的馈电装置(4a,4b,6a,6b);Feeding means (4a, 4b, 6a, 6b) for feeding the above-mentioned dipole antenna 5; 检测上述盖(3)的开闭的开闭检测装置(7);An opening and closing detection device (7) for detecting the opening and closing of the above-mentioned cover (3); 用于根据上述开闭检测装置(7)的检测结果,控制上述馈电装置(4a,4b,6a,6b)的馈电控制装置(8)。A feed control device (8) for controlling the feed devices (4a, 4b, 6a, 6b) based on the detection result of the switch detection device (7). 2.如权利要求1所述的便携式无线电单元,上述馈电装置(4a,4b,6a,6b)包括平行2线式馈电线(4a,4b),2. Portable radio unit as claimed in claim 1, said feeding means (4a, 4b, 6a, 6b) comprising parallel 2-wire feeding lines (4a, 4b), 在上述盖(3)打开的状态下以反相激励上述平行2线式馈电线(4a,4b),In the state where the above-mentioned cover (3) is opened, the above-mentioned parallel 2-wire feeders (4a, 4b) are excited in antiphase, 在上述盖(3)关闭的状态下以同相激励上述平行2线式馈电线(4a,4b)。The parallel 2-wire feeders (4a, 4b) are excited in phase with the cover (3) closed. 3.如权利要求1所述的便携式无线电单元,上述馈电装置(4a,4b,6a,6b)包括同轴线路(9),3. Portable radio unit as claimed in claim 1, said feeding means (4a, 4b, 6a, 6b) comprising a coaxial line (9), 上述同轴线路(9)具有外部导体(9a)和内部导体(9b),The above-mentioned coaxial line (9) has an outer conductor (9a) and an inner conductor (9b), 上述外部导体(9a)与上述机壳(2)短路,The above-mentioned outer conductor (9a) is short-circuited with the above-mentioned casing (2), 上述盖(3)打开的状态下激励上述内部导体(9b),When the above-mentioned cover (3) is opened, the above-mentioned inner conductor (9b) is excited, 上述盖(3)关闭的状态下激励上述外部导体(9a)。The above-mentioned external conductor (9a) is energized in a state where the above-mentioned cover (3) is closed. 4.如权利要求3所述的便携式无线电单元,上述外部导体(9a)的馈电点(10)与上述外部导体(9a)上的与上述机壳(2)的短路点(11)之间的间隔为四分之一波长。4. The portable radio unit as claimed in claim 3, between the feed point (10) of the above-mentioned external conductor (9a) and the short-circuit point (11) with the above-mentioned casing (2) on the above-mentioned external conductor (9a) The spacing is a quarter wavelength. 5.如权利要求1所述的便携式无线电单元,上述双极天线(5)沿与上述机壳(2)的长方向垂直的方向延伸。5. The portable radio unit according to claim 1, wherein said dipole antenna (5) extends in a direction perpendicular to the long direction of said housing (2). 6.如权利要求1所述的便携式无线电单元,上述双极天线(5)的顶端弯曲。6. The portable radio unit according to claim 1, wherein the tip of said dipole antenna (5) is bent. 7.如权利要求1所述的便携式无线电单元,上述双极天线(5)的顶端弯曲为蛇形。7. The portable radio unit according to claim 1, wherein the tip of said dipole antenna (5) is bent in a serpentine shape. 8.一种便携式无线电单元,具有:8. A portable radio unit having: 机壳(2);Chassis (2); 开闭自由地安装在上述机壳(2)上的盖(3);Open and close the cover (3) freely installed on the casing (2); 设置在上述盖(3)上的双极天线(5);a dipole antenna (5) arranged on the above-mentioned cover (3); 用于给上述双极天线(5)馈电的馈电装置(6);A feeding device (6) for feeding the above-mentioned dipole antenna (5); 设置在上述机壳(2)上的谐振器(9),The resonator (9) arranged on the above-mentioned casing (2), 上述谐振器(9)配置在上述盖(3)关闭时靠近上述双极天线(5)的位置。The resonator (9) is arranged at a position close to the dipole antenna (5) when the cover (3) is closed. 9.如权利要求8所述的便携式无线电单元,上述谐振器(9)包括一端短路,另一端开放的四分之一波长的谐振器。9. A portable radio unit as claimed in claim 8, said resonator (9) comprising a quarter-wavelength resonator shorted at one end and open at the other end. 10.如权利要求8所述的便携式无线电单元,上述谐振器(9)包括两端开放的二分之一波长的谐振器。10. A portable radio unit as claimed in claim 8, said resonator (9) comprising a half wavelength resonator open at both ends. 11.如权利要求8所述的便携式无线电单元,上述双极天线(5)沿与上述机壳(2)的长方向垂直的方向延伸。11. The portable radio unit according to claim 8, wherein said dipole antenna (5) extends in a direction perpendicular to the long direction of said housing (2). 12.如权利要求8所述的便携式无线电单元,上述双极天线(5)的顶端弯曲。12. The portable radio unit according to claim 8, wherein the tip of said dipole antenna (5) is bent. 13.如权利要求8所述的便携式无线电单元,上述双极天线(5)的顶端弯曲为蛇形。13. The portable radio unit according to claim 8, wherein the tip of said dipole antenna (5) is bent in a serpentine shape. 14.一种便携式无线电单元,具有:14. A portable radio unit having: 机壳(2);Chassis (2); 开闭自由地安装在上述机壳(2)上的盖(3);Open and close the cover (3) freely installed on the casing (2); 设置在上述盖(3)上的双极天线(5);a dipole antenna (5) arranged on the above-mentioned cover (3); 用于给上述双极天线(5)馈电的馈电装置(6);A feeding device (6) for feeding the above-mentioned dipole antenna (5); 检测上述盖(3)的开闭的开闭检测装置(7);An opening and closing detection device (7) for detecting the opening and closing of the above-mentioned cover (3); 第1和第2匹配电路(12,13);The first and second matching circuits (12, 13); 用于根据上述开闭检测装置(7)的检测结果,切换连接上述第1和第2匹配电路(12,13)与上述馈电装置(6)的第1切换开关(14);A first changeover switch (14) for switching and connecting the above-mentioned first and second matching circuits (12, 13) and the above-mentioned feeding device (6) according to the detection result of the above-mentioned opening and closing detection device (7); 用于根据上述开闭检测装置(14)的检测结果,切换连接上述第1和第2匹配电路(12,13)与上述双极天线(5)的第2切换开关(15)。A second switching switch (15) for switching between the first and second matching circuits (12, 13) and the dipole antenna (5) based on the detection result of the opening/closing detection device (14). 15.如权利要求14所述的便携式无线电单元,上述双极天线(5)沿与上述机壳(2)的长方向垂直的方向延伸。15. The portable radio unit according to claim 14, wherein said dipole antenna (5) extends in a direction perpendicular to the long direction of said housing (2). 16.如权利要求14所述的便携式无线电单元,上述双极天线(5)的顶端弯曲。16. The portable radio unit as claimed in claim 14, wherein the tip of said dipole antenna (5) is bent. 17.如权利要求14所述的便携式无线电单元,上述双极天线(5)的顶端弯曲为蛇形。17. The portable radio unit according to claim 14, wherein the tip of said dipole antenna (5) is bent in a serpentine shape.
CN00811709A 2000-06-12 2000-06-12 Portable radio unit Pending CN1370341A (en)

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